I've the exact problem in Evolution 2.26.1 (Ubuntu 9.4). I see the same problem is reported upstream already under the bellow id.
https://bugzilla.gnome.org/show_bug.cgi?id=586253 ** Bug watch added: GNOME Bug Tracker #586253 http://bugzilla.gnome.org/show_bug.cgi?id=586253 -- evolution displays wrong unread messages number https://bugs.launchpad.net/bugs/429591 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
